Jail-bar.



W. F. KLETT.

JAIL BAR. n -APPLIGATION FILED MAY 21,1910.

971,900. Patnted Oct. 4, 1910] INVENTOR l V/LL/flM Km: 77'

WITNESSES:

ATTORNEYS THE MoRRls PETERS co., wnsunvnmrv, n c.

WILLIAM F. KLETT, or MOBILE, ALABAMA.

JAIL-BAR.

Specification of Letters Patent. Patented Oct, 4, 1910, Applicationfiled May 21, 1910. Serial No. 562,712.

3 To all whom 'it may concern: and casing and adapted to pnoduce analarm Be it known that I, WILLIAM F. KLETT, a when the rod is turnedrelativelytosthecascitizen of the United States, and a resident ing.This detonating powder or chemical is of Mobile, in the county of Mobileand adapted to era e as an automatic alarm 5 State of Alabama, haveinvented certain When exploded by the friction of the rod as new anduseful Improvements in J ail-Bars, it is turned within the casing, suchfriction of which the following is a specification. causing an explosionas is Well understood This invention is an improvement in bars by thoseskilled in the art. for use in jails and similar inclosures and If, inoperation, a out be made through has for an object to provide a novelconthe casing tube or shell by a saw, file or other struction by whichan alarm will be sounded cutting instrument, such instrument when inevent of any one attempting to saw coming in contact with the innerrotatable through the bars; and the invention consists rod will causethe latter to turn, thus prein certain novel constructions andcombinaventing the instrument from cutting the rod 5 tions of parts aswill be hereinafter described and also causing the explosion and alarmas and claimed. before described.

In the drawing the figure is a side eleva- Manifestly the bars insteadof being distion, partly in section, of a jail bar emposed verticallymay be arranged horibodying my invention. zontally without departingfrom the inven- The invention seeks to provide a non-sawtlon, and theinvention will operate as a safeable ail bar and the bar as showncomprises guard both from within and Without in prean outer section orcasing A which is in the venting the cutting of jail bars or bars forform of a tube which may be of iron, steel, other structures for whichan iron, steel or brass, bronze, copper or other metal forged, othermetal grating may be used or intended rolled or cast of any suitabledimension for as a protection for any building to which the purpose forwhich it is designed and such devices may be properly fitted, such forwithin this shell or casing is placed a rod instance, as jail doors,jail cells and win- B as shown. This rod is entirely inclosed dows,mausoleum gratings, transom and winwithin its casing and the latter maybe dow gratings, bank fixtures and safety vault closed at one end by theplug G held by the inclosures. cross pin C and the lower end of thecasing I claim: may be closed by the plug D held to the cas- A bar forjails and the like comprising a ing by the cross pin D as shown. casing,a rod mounted to turn therein and At its lower end the rod B is shownexplosive means between the rod and casing rounded, supported on balls Bwhich form and adapted to produce an alarm when the an anti-frictionbearing for the lower end of rod is turned relatively to the casing. thesaid rod. Some detonating powder or WILLIAM F. KLETT. chemical E whichmay be chlorate o-fpotash Witnesses: and sulfur or a similar compositionof chlo- JOHN T. GoRMoN,

40 rate 0 is arrfrajiged befaveen the rod JAMES S. VINE.

